NBN interference

[VK2CSW]

That makes it hard to pin it on the NBN - they will do that test.

Now there is a grey area though. I was lucky here as initially I was the only one who was yet connected to the DPU, so when I powered down the NCD I also powered down the DPU. (The consumer powers the NBN FTTC gear from the NCD). Once others were connected they kept supply to the DPU when I pulled the power off.

Just something to keep in mind when designing test scenarios and tracing the noise.